package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private RedisTemplate redisTemplate;
    @Autowired
    private SystemUserMapper systemUserMapper;

    /**
     * 生成一段验证码存储到 Redis
     *
     * @return
     */
    @Override
    public CaptchaVo getCaptcha() {
        // 1. 创建SpecCaptcha对象（是一个第三方库），用于生成验证码图片
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        // 2.设置验证码的字符类型为默认类型（数字 + 字母）
        specCaptcha.setCharType(SpecCaptcha.TYPE_DEFAULT);
        // 3.返回验证码的文本内容，并将其转换为小写
        String code = specCaptcha.text().toLowerCase();

        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID();

        // 将验证码图片转换为Base64编码的字符串，可以方便地在Web页面中通过数据URI直接显示
        String image = specCaptcha.toBase64();
        redisTemplate.opsForValue().set(
                key, code, RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        return new CaptchaVo(image, key);
    }

    @Override
    public String login(LoginVo loginVo) {
        //1.判断是否输入了验证码
        if (!StringUtils.hasText(loginVo.getUsername())) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }
        //2.校验验证码
        String code = (String) redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if (code == null) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        if (!code.equals(loginVo.getCaptchaCode())) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //3.校验用户是否存在
        LambdaQueryWrapper<SystemUser> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SystemUser::getUsername, loginVo.getUsername());
        SystemUser systemUser = systemUserMapper.selectOne(queryWrapper);
        if (systemUser == null) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }

        //4.校验用户是否被禁
        if (systemUser.getStatus() == BaseStatus.DISABLE) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        //5.校验用户密码
        if (!systemUser.getPassword().equals(loginVo.getPassword())) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        //6.创建并返回TOKEN
        return JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());
    }

    @Override
    public SystemUserInfoVo getSystemUserInfoById(Long userId) {
        SystemUser systemUser = systemUserMapper.selectById(userId);
        SystemUserInfoVo systemUserInfoVo = new SystemUserInfoVo();
        systemUserInfoVo.setName(systemUser.getName());
        systemUserInfoVo.setAvatarUrl(systemUserInfoVo.getAvatarUrl());
        return systemUserInfoVo;
    }
}
